Improvement in furnaces for steam-boilers



THOMAS F. MORRiSON. Improvement in Furnaces for Steam-Boilers. No114,024.

Patented April 25, 1871.

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THOMAS F. MoRnIson, or BRYAN, OHIO, ASSIGNOR TO MORRISON & FAY,

- or SAME PLACE.

Letters Patent No. 114,024, dated 25, 1871.

IMPROVEMENT IN FURNACES FOR STEAM-BOILERS.

The Schedule referred to in these Letters Patent and making part ofthesame.

To whom ct may concern Be it known that I, THOMAS F. Mo'nnison, 0 Bryan,in the county of Williams and State of Ohio, have invented a new anduseful Improvement in Furnaces for Steam-Boilers; and I do declare thatthe following is a true and accurate description thereof, referencebeing bad to the accompanying drawing and to the letters of referencemarked thereon and being a part of this specification, in which- Figure1 is a perspective of a furnace with my improvements, with one of thegrate-bars removed to show the perforated pipes.

Figure 2 is a plan view of the air-pipes.

Like letters indicate like parts in each figure.

The nature of this invention relates to an improve ment in theconstruction of furnaces for steam-boilers, by means of which thedraught may be materially increased, and by which the fire may bereadily extinguished when desired.

The invention consists in a series of perforated pipes, connected ateach end with pipes not perforated, so arranged that the former may beemployed as grate bars, if desired, in combination with any suitableblower, to force a current of airthrough the pipes and perforations toincrease the draught.

Also, in a steam-pipe connecting the steam-space in the boiler with saidpipes,first described, for the purpose of'extinguishing the fire in thefurnace when desired by smothering the same with steam.

Also, in combination with said first-described pipes, any suitablegrate-bars, to be employed if deemed preferable, all arranged andoperating as more fully hereinafter described.

In the accompanying drawing- A represents the side walls of a furnace,and

B the fire front.

A pipe, 0, to be connected at a with any suitable fan or blower, extendsacross the front of the furnace, and at b it connects with a steam-pipe,D, the upper end of which should connect with the steam-space of theboiler.

Connected with this pipe 0 is a'scries of perforated pipes, E, whoseother ends are connected with another pipe, h, which extends across therear-.of the furnace.

The ends of this latter pipe should project through the side walls andbe provided with caps G, so arranged that they may be readily removedwhen necessary.

The pipes O E F should be so connected as to have a free anduninterrupted interior communication with each other.

H are grate-bars of any desired pattern, the front and rear ends ofwhich rest upon the pipes G and F and above the perforated pipes E.

The pipe 0 is provided with a proper valve, 11, as is also thesteam-pipe D with valve H, for the purposes hereinafter described.

The valve h in the steam-pipe being closed, and the i valve 11 intheair-pipe being open, and the blower in operation, a current of air isforced through the pipe 0 into the perforated pipes E, whence itescapes, to increase the draught, through the perforations, while anyashes that may fall through the perforations are blown into the pipe F,whence they may be removed by taking otf the caps G.

Toextinguish the fire close the valve (2 and open the valve h, when acurrent of steam will be driven through the pipes and perforations forthat purpose.

What I claim as my invention,and desire to secure by Letters Patent, is-

1. The pipes (1, E, and F, provided with caps G, when constructed andarranged, for the purposes described, in combination with any suitablefan or blower, as set forth.

2. In combination with said pipes O, E, and F, provided with caps G. thesteam-pipe D, for the purposes set forth.

3. In combination with pipes O, E, and 1*, provided with caps G, thegrate-bars H, when arranged as described,

THOMAS F. MORRISON.

Witnesses:

1%. J. Gmnons, Enwrn ANDREWS.

